Fix accessBitmap() with deferred clear, GPU path.

src/gpu/SkGpuDevice.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkGpuDevice.h"
 
 #include "effects/GrBicubicEffect.h"
@@ skipping 415 matching lines @@
         flags = GrContext::kUnpremul_PixelOpsFlag;
     }
     fRenderTarget->writePixels(x, y, info.width(), info.height(), config, pixels, rowBytes, flags);
 
     // need to bump our genID for compatibility with clients that "know" we have a bitmap
     this->onAccessBitmap().notifyPixelsChanged();
 
     return true;
 }
 
+const SkBitmap& SkGpuDevice::onAccessBitmap() {
+    DO_DEFERRED_CLEAR();
+    return INHERITED::onAccessBitmap();
+}
+
 void SkGpuDevice::onAttachToCanvas(SkCanvas* canvas) {
     INHERITED::onAttachToCanvas(canvas);
 
     // Canvas promises that this ptr is valid until onDetachFromCanvas is called
     fClipData.fClipStack = canvas->getClipStack();
 }
 
 void SkGpuDevice::onDetachFromCanvas() {
     INHERITED::onDetachFromCanvas();
     fClipData.fClipStack = NULL;
@@ skipping 1590 matching lines @@
     if (NULL == data) {
         return false;
     }
 
 #if 0
     const GPUAccelData *gpuData = static_cast<const GPUAccelData*>(data);
 #endif
 
     return false;
 }